Lock.



F. BANNER.

LOCK.

APPLICATION FILED MAR. 2, 1912.

' Patented Oct. 22, 1912.

P IyvEN-roR Cf/zaM/ J W I m E s s E s COLUMBIA PLANDGRAPH CD-, WASHINGTON, D. C.

FRANK BANNER, o'r's'r. LOUIS, MISSOURI.

LOCK.

Specification of Letters Patent.

Patented Oct. 22,1912.

Application filed March 2, 1912. Serial No. 681,247.

with the levers bringing the same in simul-' taneous contact with the tumblers for releasing the bolt which is spring actuated.

A further object of my invention is to provide a lock provided with a'bolt barrel in which is located a spring actuated serrated locking bolt and a plurality of tumblers operating in conjunction with the bolt for holding the same in locked position and means for operating the tumblers to release the bolt by the insertion of a key under pressure.

Figure 1 is aperspective view of a mail box showing my improved lock in position. Fig. 2 is a horizontal sectional View of the lock taken on the line 22 of Fig. 3 showing the mechanism in plan View. Fig. 3 is a vertical cross sectional view taken on the line 33 of Fig. 2. Fig. 4 is a vertical sectional View of the lock in locked position taken on the line 44 of Fig. 2, and showing the manner of connection with the latch lock on the door. Fig. 5 is a detail perspective view of one of the tumblers. Fig. 6 is a detail perspective View of the key made use of in operating the tumblers. Fig. 7 is a diagrammatic view showing the tumblers, levers and key in their relative position by which the tumblers are simultaneously operated.

In the construction of my invention I provide a suitable lock casing 8 consisting of a top 9, sides 10, ends 11, and a bottom 12, and are connected together many desirable and mechanical manner; this casing or housing is located in the mail box or other suitable receptacle in a position as shown in Fig. 1 and in proper relation with the door 13 to which the latch lock 14 is attached-for entering into the casing or housing to 'automatir.

cally lock itself when the door is, closed.

in the same is slidably mounted the lock bolt 16 provided with serrations formed by cutting the bolt fo-rming conical divisions 17, each division provided with a rectangular shoulder or looking surface 18; the one end of the bolt is provided with a recess 19 formlng a tooth or projection 20 into which the tooth 21 of the latch lock 14 is adapted to be seated.

The bolt barrel 15 between the one end and the partition wall 22 is slotted as indicated by the numeral 23; these slots being located at equal intervalsapart and formed on the top and the bottom portion of the barrel; in these slots operate the tumblers 24. These tumblers are constructed with a- I bifurcated end 25, each pivotally mounted on a pivot pin 26 extending from partition to end and over said pin is located a spring 27 its one end contacting beneath the weighted end 28 of the tumbler, the opposite end 29 of the spring contacting with the top or cover 9 of the casing; this spring also contacts with the shoulder 30 of the weighted end and by means of the spring contacting with the cover has a tendency to keep the tumblers in a posit-ion as shown in Fig. 3, causing the lower jaws 31 of the bifurcated end to operate in the lower slots of ,the barrel and contact with the shoulders 23 of the conical portions; the upper jaws 32 of the bifurcated ends are so arranged as to be in a position as shown in Fig. 3 so that when the tumblers are tilted that the lower jaw 31 frees the shoulders 18, the lower surface of the upper jaws will permit the bolt to freely move in the barrel outwardly by means of the action of the compressed spring 33, which is supported around the stud 34, its one end 35 contacting with the partition wall, the opposite end against the pin 36 secured to the bolt.

The purpose of the upper jaw 32 is that in the event the tumbler should be tilted downwardly at too great an angle the same will contact with the shoulders 18 and still retain the bolt in locked position; this is if in the event the bolt should be tampered with or picked by an instrument other than the proper key The particular manipulation of this mechanism for properly operating the tumblers will be fully hereinafter "described- Beneath the tumblers is located a like number of levers 37 each pivoted on a rod 38 supported on the partition wall and end wall, the free ends operating in a guide 38 formed in the shape of a yoke and provided with a like number of slots to correspond with the number of levers and tumblers, these slots extending downwardly to a point indicated by the numeral 39 forming shoulders upon which the levers 37 rest, and in alinement with the guide, and in the bottom 12 ofthe casing is formed an elongated slot 40 into which the key 41 is inserted for contacting with the plurality of levers for operating the several tumblers and bringing each in a position as to permit the bolt to spring outwardly in an unlocked position for releasing the latch lock.

By referring to Fig. 7 I show a diagrammatic View to illustrate the position and sizes of the tumblers in conjunction with the levers and the shoulders and the recesses of the key.

In looking the door of the box it is simply necessary to throw the door to, the latch lock contacting with the inclined surface 42 throwing the tooth 21 upwardly into the recess 19 of the lock bolt at the same time forcing the lock rearwardly in a position as shown in Fig. 4, the conical sections manipulating the tumblers allowing each to assume 1 a position in front of each conical section and contact with the shoulder 18.

In order to unlock the bolt the key 41 is inserted in the slot 40 and the same pressed upwardly, the various portions of the con tact surface of the key contacting with the several levers 37 pressing the same upwardly and the same are so positioned that each lever will simultaneously engage with the tumbler thereby simultaneously tilting the tumblers releasing the lower jaw 31 from the shoulder and the plate portion of the key 41 is of such depth as to prevent the key from being inserted too far into the slot by means of the enlarged portion 43.

The object of constructing the tumblers with various sizes of weighted ends is to prevent the picking of the lock, for example if a key or straight instrument was to be inserted in the slot which was not of identical form as required to open the same one or a number of the tumblers when being pressed upwardly would operate in advance of the other and cause the upper jaw 32 to move downwardly in the upper slots of the barrel and contact with the shoulder of the conical portions in which manner the lock would still remain closed but when the proper key is inserted and each of the tumblers operated in unison so that the opening of the bifurcated ends are in proper alinementand the shoulders of the bolt freed the bolt will operate forwardly by the spring portions of the bolt, levers pivotally mount- 7 ed in the casing and designed to be brought in contact with the tumblers for tilting the same, a key for operating the levers .and tumblers in unison for releasing the tumblers from the bolt and a spring for throwing the bolt outwardly when the tumblers. hailre been released, substantially as specifiec.

plurality of conical portions forming rec- 2. A lock comprising a casing, alocking bolt located therein, said bolt formed into a tangular shoulders, a spring controlling the I movement of said bolt, a pluralityof tumblers arranged to contact with the shoulders of the bolt for holding the bolt in locked position, levers pivotally mounted in the casing beneath the tumblers, for tilting the same when akey is inserted into the casing and contacting with the levers, substantially as specified.

3. A lock of the class described comprising a casing, a barrel having a plurality of slots formed therein, a locking bolt located in said barrel, said bolt provided with a plurality of shoulders, a plurality of bifure cated tumblers pivotally mounted, the jaws of the bifurcated ends of the tumblers operating in the slots of the barrel and designed to contact with the shoulders of the bolt for holding the same in locked position, the opposite end of the tumblers being vweighted, means for keeping the tumblers in a locked position by the lower jaws cpntacting with the shoulders of the bolt, levers located beneath the tumblers, a slotted guide supporting the free ends or the levers, the weighted ends of the tumblers being of various sizes to correspond with the surface of a key to be inserted in a slotted indication and to enter into the guide and contact with the levers for tilting the tumblers, thereby releasing the bolt, substantially as specified.

In testimony whereof, I have signed my name to this specification, in presence of two subscribing witnesses. V

FRANK DANNER. W'itnesses:

ALFRED A. EIOKS, WALTER O. STEIN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. G. 

